Amorphous silica and its effects on shale reservoir: A case study about Yanchang formation lacustrine shale, Ordos Basin

被引：6

作者：

Liu, Guoheng ^{[1
,2
]}

Zhai, Gangyi ^{[1
]}

Zou, Caineng ^{[3
]}

Huang, Zhilong ^{[2
]}

Liu, Bo ^{[4
,5
]}

Guo, Xiaobo ^{[6
]}

Guo, Tianxu ^{[1
]}

Chai, Mingrui ^{[7
]}

Wang, Hao ^{[8
]}

机构：

[1] China Geol Survey, Oil & Gas Survey, Beijing, Peoples R China

[2] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China

[3] PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China

[4] Northeast Petr Univ, State Key Lab Cultivat Base Jointly Constructed H, Accumulat & Dev Unconvent Oil & Gas, Daqing, Peoples R China

[5] Northeast Petr Univ, Minist Sci & Technol, Daqing, Peoples R China

[6] XIAN Univ Petr, Sch Earth Sci & Engn, Xian, Shaanxi, Peoples R China

[7] Yangtze Univ, Coll Earth Sci, Wuhan, Hubei, Peoples R China

[8] China Univ Geosci, Sch Earth Sci & Resources, Beijing, Peoples R China

来源：

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS | 2019年 / 41卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Amorphous SiO2; lacustrine shale; ordos basin; QEMSCAN; quantitative calculation; QUARTZ-CEMENTATION; SEISMIC VELOCITY; GAS; MODEL; OIL; SANDSTONES; DIAGENESIS; DENSITY; PERMEABILITY; QUALITY;

D O I：

10.1080/15567036.2018.1522395

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The content of amorphous silica in Yanchang formation shale ranges from 1.48% to 19.89%, with an average of 11.77%. The Chang 7-3 submember (the submember 3 of the seventh member of Upper Triassic Yanchang formation) shale contains much larger content of amorphous silica. Amorphous silica appears as opal rim closely adjacent to detrital quartz, cement among clay minerals, and cement aside detrital minerals. Silica originates from clay mineral transformation and pressure solution of detrital quartz. Mineral composition, growth space, and overpressure affect the content of amorphous silica. Amorphous silica reduces the brittleness of shale reservoir, decreases the density of Chang 7-3 submember shale, and causes an increase in AC values for Chang 7-3 submember shale.

引用

页码：975 / 989

页数：15

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